Shaikhul Islaam Ibn Taymiyyah rahimahullaah said:

“Whoever wastes the foundations (of knowledge) is prevented from attainment (of subsidiary issues), and whoever leaves off the (Legislative) Evidences strays from the (Correct) Path.” End translation. [ad-Durur as-Siniyyah (352/5)]

Translated by

Zain Irfan
Abu Abdil-Baaree